class Game
    def initialize(title="怪物猎人世界",price=200)
        @title = title
        @price = price
    end

    def show()
        puts "title #{@title}"
        puts "price #{@price}" 
    end

    def show2()
    end

    def show3()
    end
end

puts Game.instance_methods(false)

mario = Game.new("super mario",360)
if mario.respond_to?("show")
    mario.send("show")
end


